Bridge Barriers and Parapets

Bridge Barriers and Parapets in Relation to the Crash Testing Standards

Bridge Barriers and Parapets
This paper aims to review and compare the information on the function, level of service, design and specific types of bridge barriers and parapets used under the two most widely recognized and accepted crash-testing standards viz American NCHRP Report 350 and European Union EN 1317. This will help to promote discussion and clarify issues on the use of traffic barriers associated with bridges in different countries where such standards does not exist. Reference to research documents and codes is made within the text.

The American NCHRP Report 350 and the European Union EN 1317 are currently the two most widely recognized and accepted crash-testing standards. The American Federal Highway Administration (FHWA) issues letters of approval for bridge rails that comply with NCHRP 350 and maintains a website of all approved bridge rails. At this stage, a similar central repository of Comité European de Normalisation (CEN) approved bridge rails does not appear to exist. It is understood that CEN stipulates that compliant systems have to be crash tested to the requirements of EN 1317 but does not issue certificates of compliance. Without such a system, it would be difficult for a road authority to verify CEN compliance of any proposed barrier system.

Australia as an example (in comparison to the countries like India which does not have their indigenous testing board) have developed traffic barrier specifications which are based on crash testing requirements developed by the United States Transportation Research Board (National Cooperative Highway Research Programme (NCHRP) Report 350). Debate needs to be initiated in countries where such system does not exist on the basis of the available crash-testing standards to standardize the requirements of the bridge barriers.

Wasim Qadir, Sr. Bridge Design Engineer, ASHGHAL, Public Works Authority, Doha, Qatar

Introduction

This paper aims to review and compare the information on the function, level of service, design and specific types of bridge barriers and parapets used under the two most widely recognized and accepted crash-testing standards viz American NCHRP Report 350 and European Union EN 1317. This will help to promote discussion and clarify issues on the use of traffic barriers associated with bridges within India or similar areas around the world. Reference to research documents and codes is made within the text.

Basically two types of barriers exist on bridges, these being:
  • traffic barriers and
  • pedestrian barriers
Pedestrian barriers are typically the post/baluster type. Traffic barriers however come in avariety of configurations to suit particular circumstances, including flexible, semi-rigid, rigid beam and post, and rigid concrete barriers. Concrete parapets are preferred as they present a cleaner fascia and have improved noise attenuation characteristics.

Parapet panels are usually located along the outside edges of a bridge and some times extend along abutment embankment wingwalls.

NBM&CW October 2011

Click Here
To Know More / Contact The Manufacturer
Please provide your details we will contact you as soon as possible
Please let us know your name.
Invalid Input
Please let us know your Designation.
Invalid Input
Please let us know your City.
Please let us know your State.
Please let us know your Country.
Please let us know your Contact Number.
Please let us know your email address.
Please brief your query.

Innovation in Bridges Components and Materials

The Infrastructure Industry is continuously evolving; new roads, elevated corridors, expressways, railways, dedicated corridors, metros, mono-rails are being constructed all the time. They also require constant Read More ...

World's Most Amazing Bridges

The 6.5 feet wide walkway in the Hongyagu Scenic Area in Hebei province hangs 755 feet above the ground, and is the world's longest bridge, which opened in 2017-end. Designed by Tel Aviv architect Haim Dotan Read More ...

An Experimental Study to Estimate Loss of Prestress and Determining Fundamental Natural Frequecny of Prestressed Concrete Bridge

Prestressed Concrete (PSC) structures especially bridges are being largely used all over the world due to their multifarious advantages in terms of structural behaviour, economy as well as aesthetical Read More ...

Experimental Investigations on the Structural Behaviour of a Distressed Bridge

Four Span Pipe Bridge
Distressed structures require necessary remedial measures in order to restore their original structural properties like strength and stiffness. Validating the effectiveness of the proposed qualitative remedial Read More ...

World’s Aesthetic Foot Bridges

Foot Bridges
Footbridges have a longer history than road or railway bridges. Ancient footbridges comprised of natural materials such as roots of trees, ropes, stones, masonry, and wood. Modern footbridges are built Read More ...

Load Testing of Second Thane Creek Bridge, Mumbai

Thane Creek Bridge
Load testing is done to determine the safe load carrying capacity of structures, determining if specific legal or overweight vehicles can safely cross the structure or needs to be restricted and the level of post Read More ...

Corrosion Preventive Methods Adopted for Concrete Bridges During Construction

Bridge in Central Kerala
Cement concrete is a versatile building material and is the second most consumed material in the world, after water. It is made using porland cement, coarse, and fine aggregates, water and one or more Read More ...

Recent Developments in Design and Construction of Concrete Road Bridges

Concrete Road Bridges
Planning, design and construction of bridges and flyovers is very challenging at places with space constraints. There has been rapid development with the availability of high strength steel and concrete Read More ...

Integral Abutment Bridges

Integral Abutment Bridges
The conventional bridges use expansion joints and bearings to accommodate the thermal movements of the bridge. However, they don't completely eliminate the distress caused because Read More ...

Restoration of 45 Years Old PSC Bridge by External Post Tensioning

Bridge Restoration
The use and advantages of Post Tensioning are very well known in the Civil Engg Industry as it has been in use for the last 40 to 50 years. Post tensioning is one of the best methods to induce stresses in the concrete Read More ...

Signature Bridge: A Landmark Engineering Marvel in the Making

Signature Bridge
Wazirabad Bridge or Signature Bridge Project is an initiative of Delhi Government, planned during the Commonwealth Games. It was conceptualized to be a landmark tourist icon that would also speed Read More ...

Analysis of Integral Abutment Bridge by Grillage Method

Integral Abutment Bridge
An integral bridge may be defined as having no expansion joints or sliding bearings, the deck is continuous across the length of the bridge. Integral bridges are alternatively referred to as integral abutment Read More ...

Soil Structure Interaction of Integral Bridge Using Finite Element Method

Soil Structure Interaction
A type of bridge that is used extensively in road applications in particular is the integral abutment bridge (IAB). The concept of "integral abutment bridge" has recently become a topic of remarkable Read More ...

Rehabilitation of Distressed Bridges

Cracks in Ravi Bridge
Before carrying out any testing of the concrete structures using NDT methods, visual inspection of the structure is a must. Visual inspection is not confined to the surface, it also include examination of bearings Read More ...

Strengthening of Mithi River Bridge at Mumbai Airport

Mithi River Bridge
Strengthening of RCC structural elements is a common task for maintenance nowadays. For the purpose of strengthening, several materials and methods are available such as sprayed concrete Read More ...

Bridge Health Management

Bridge Health Management
Bridge maintenance is necessary to keep all bridges traffic worthy. Immediately on completion of a bridge there is a need to keep observation on its behaviour under various conditions Distress if any Read More ...
NBM&CW

New Building Material & Construction World

New Building Material & Construction World
MGS Architecture

Modern Green Structures & Architecture

Modern Green Structures & Architecture
L&ST

Lifting & Specialized Transport

Lifting & Specialized Transport
II&TW

Indian Infrastructure & Tenders Week

Indian Infrastructure & Tenders Week